What is CVE-2026-73249?

CVE-2026-73249 is a high-severity vulnerability in Kovidgoyal Calibre, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-08-11.

How severe is CVE-2026-73249?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Kovidgoyal Calibre

CVE-2026-73249

calibre is an e-book manager. Prior to 9.12.0, the calibre Content Server endpoint POST /book-update-annotations/{library_id}/{book_id}/{fmt} in src/calibre/srv/books.py omits needs_db_write=True, causing Router.dispatch() to skip ctx.chec…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Kovidgoyal Calibre — versions < 9.12.0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-73249?: CVE-2026-73249 is a high-severity vulnerability in Kovidgoyal Calibre, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-08-11.
How severe is CVE-2026-73249?: High severity. CVSS v3 base score is 7.5 out of 10.